The more the stone is looked at, the keener becomes the sight. In our territory is a certain waterless sea, consisting of tumbling billows of sand never at rest. None have crossed this sea; it lacks water altogether, yet fish are cast up upon the beach of various kinds, very tasty, and the like are nowhere else to be seen. Three days’ journey from this sea are mountains from which rolls down a stony, waterless river, which opens into the sandy sea. As soon as the stream reaches the sea, its stones vanish in it, and are never seen again. As long as the river is in motion, it cannot be crossed; only four days a week is it possible to traverse it. Between the sandy sea and the said mountains, in a certain plain is a fountain of singular virtue, which purges Christians and would-be Christians from all transgressions. The water stands four inches high in a hollow stone shaped like a mussel-shell. Two saintly old men watch by it, and ask the comers whether they are Christians, or are about to become Christians, then whether they desire healing with all their hearts. If they have answered well, they are bidden to lay aside their clothes, and to step into the mussel. If what they said be true, then the water begins to rise and gush over their heads; thrice does the water thus lift
